A Nation-Destroying Monster, Begging to Be My Little Brother?

Also known as "You want such a garbage monster?" In the summoning world, the summoner's talent is determined by the number of pages in the summoning book. The more pages, the more spirit-calling beasts that can be contracted. Those with rubbish qualifications will have one or two pages, those with ordinary qualifications will have three to five pages at most; those with excellent qualifications will have six to eight pages; those with nine pages will be considered geniuses; those with ten pages will be the legendary full pages, rare to see in a hundred years... However, the protagonist Chen Hai's summoning book has unlimited pages, and the legend begins.